I have had the High Bright now for 4 months. I have used it on Spark, Mavic and P4 Pro.
Spark, it's worthless as you need the Wifi turned on from CS and thus battery life suffers, but I had a ton of control problems so said, no more.
Mavic, it's for the most flawless. A lot of flights, no App lock ups, no Video lock ups. The only thing I see is an occasional video lag on pans. The video jumps to catch up as you pan. Sometimes the video live view pixelates, but that does not last more than a few seconds.
P4 Pro and P4 Pro Vr 2.0. Both have IMO really severe issues.
1. App disconnects, during flight you get a message that the app has disconnected, your video will freeze where the disconnect happened. You still have full RC control and if in VLOS can fly back manually, but if you are a ways out say 1600 feet, (I still can see a P4 out that far), you still have to figure out craft orientation and that far out it can be difficult to not to panic.
2. Video Freezes, here the app never disconnects, but the video still is frozen. You can attempt a reboot of the CS or power cycle, but personally I would rather not do that.
3. Camera freeze when switching between video and stills. This just started with the latest firmware to support P4 Vr 2.0.
On switching to the stills from video, the shutter button is greyed out and all camera features are locked up. Reboot or power off of CS does not fix this, you have to power cycle the drone so I am not sure if it's a CS or P4 Vr 2.0 issue. But I have not seen this with the iPad on the Vr 2.0.
Net, I love the hardware and design of the CS. I returned my Ultra bright due to all the problems folks were having with the ultras burning out. The high bright 7.5 is a great design, love the size and touch screen is excellent. I can see the high bright in most of the outdoor shooting and the screen resolution/app have a much better unification. Thus your stills look more in focus than with the iPad (the djigo4 app does not respect retina resolution, "respect" is an Apple developers term) Instead the djigo4 app is displaying around 720 and that is way below the iPad screen resolution. So critical focus is much hard to work. This is not an issue with the CS as images on screen have much better display resolution.
Battery life, is all day, (well 1 battery will last much longer than a P4 on 6 flights). You need a p4 charger to charge the CS as it doesn't come with one.
I am surprised at just how many issues the Phantom seems to have with the CS. Problems that IMO should not be there. The version of djigo4 on the CS is not the same as the standard android version and DJI rolls out updates a bit behind the standard android version. But still if android users were seeing as many lockups and app disconnects with their phones or tablets, I feel that there would be a lot more posting. Instead those products seem pretty solid.
For now I only use the CS on my P4's for short flights and where I know I will stay in good VLOS. On the Mavic I have gone out much further, with no problems.
Paul Caldwell